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     The relationship between the occurrence of Oidium leaf-fall and the climatic conditions prevailing in Guangdong Province revealed that the occurrence is of four different climatic types, namely warm winter-spring type, warm winter and cool spring type, cold winter and cool spring type, and dry winter-spring type.
     分析广东垦区的白粉病发生与气候的关系,发现有四种流行气候型:(1)冬春温暖流行型,(2)冬暖春凉流行型,(3)冬冷春凉流行型,(4)冬春干旱流行型。
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     This paper compares and analyses the climatic characteristics of extreme climatic year and the growth status of the over ground part of winter wheat. In the year of 2003, the climate is characterized as cold winter, chilly spring, scarce sunshine and abundant spring rainfall.
     对冬小麦极端气象年份的气候特征与小麦地上部生长发育状况进行了分析比较。 在2003年寒冬冷春、日照偏少、春雨偏多的气候条件下,与2002年相比,冬小麦主要生育期分别推迟4~18d,单位面积茎数(峰值)减少29.1%;
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     Spring
    
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     COLD WATER AREAS ON THE SEA SURFACE OFF SUBEI IN LATE SPRING AND SUMMER
     夏期间苏北海面的
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     Spring Snow
    
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     On cold fusion
     核聚变
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     Cold Mountain
    
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  cold spring
In years with a cold spring or autumn, critical situations may occur with starvation, resulting in cyclic population patterns.
      
Dokuzpinar cold spring, YMS and ACMS localized mainly along the faults within the region have higher Na+ and Cl- contents whereas TGS and BTMS have higher amounts of Ca2+ and HCO3-.
      
Dokuzp?nar cold spring is undersaturated in terms of the above minerals.
      
The flowering dogwood trees and green lawns of Cold Spring Harbor provided the setting for a meeting devoted to Mitochondrial Genes from May 13-17th, 1981.
      
Synchronization of circannual cycles: a cold spring delays the cycles of thirteen-lined ground squirrels
      
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The epidemic course of Oidium heveae in Guangdong Province may be divided into three stages, namely, the central disease plant(or patch) stage, the disease increasing and spreading stage, and the disease abating and disappearing stage. In different years and places the disease occurs in three different ways: (1) It comes on extensively at the very beginning, becomes severer later on and then tapers off from the epidemic peak. (2) It starts from the central disease plant(or patch) and becomes severer in a rubber...

The epidemic course of Oidium heveae in Guangdong Province may be divided into three stages, namely, the central disease plant(or patch) stage, the disease increasing and spreading stage, and the disease abating and disappearing stage. In different years and places the disease occurs in three different ways: (1) It comes on extensively at the very beginning, becomes severer later on and then tapers off from the epidemic peak. (2) It starts from the central disease plant(or patch) and becomes severer in a rubber stand or a large area, and then tapers off. (3) It appears very late and sporadically without either a central disease plant(or patch) or epidemic peak in a large atea. An analysis of the data covering more than 20 years Showed that such factors as the temperature in winter and spring, the duration of overwintering refoliation, teh starting time of the epidemic, the amount of overwintering inocula, and the number of rainy days in the young leaf stage are closely associated with the epidemic, but with temperature as the leading factor. A drizzly weather with low temperature tends to favour the development of the disease. Temperature has been found to influence the epidemic intensity through its action upon the rate of defoliation and the duration of refoliation. The relationship between the occurrence of Oidium leaf-fall and the climatic conditions prevailing in Guangdong Province revealed that the occurrence is of four different climatic types, namely warm winter-spring type, warm winter and cool spring type, cold winter and cool spring type, and dry winter-spring type. In the light of many years' epidemic intensity and frequency as well as the climatic and phenological features in the rubber-growing areas in Hainan Island and Zhanjiang prefecture, Guangdong Province may fall into three epidemic regions, namely, frequently occurring region, easily occurring region, and occasionally occurring region.

流行过程一般可分为三个阶段:(1)中心病株(区)阶段;(2)病害增长蔓延阶段;(3)病情下降消退阶段。病害在不同的年份和地区按三种方式发展:(1)一开始发病即较普遍,后转严重,到达高峰后逐渐下降消退;(2)以中心病株(区)为始点,使林段或大区病情逐渐加重,后转消退下降;(3)病害出现很迟,零星分散,没有中心病株(区),也没有大区流行高峰期。 20多年的资料研究分析结果表明,冬春温度,抽叶期长短,病害流行始点期出现迟早,越冬菌量,嫩叶期雨日等,与病害流行关系较密切。冬春温度是病害流行的主导因素。低温阴雨天气是病害发展的综合有利条件。温度主要是通过落叶、抽叶物候影响病害的流行强度。分析广东垦区的白粉病发生与气候的关系,发现有四种流行气候型:(1)冬春温暖流行型,(2)冬暖春凉流行型,(3)冬冷春凉流行型,(4)冬春干旱流行型。根据海南岛、粤西垦区各地历年病害的流行频率和流行强度,气候、物候特点,可将广东垦区划分为三个流行区:(1)常发区,(2)易发区,(3)偶发区。

By the investigation of germplasm resource of vegetables conducted in Qiannan mountainous area of Guthou province,858 varieties that belong to 41 species of 10 families have been collected and it obviously indicates the abundant vegetable resourccs in thig area.The wholesurveyed area,in view of different climatic characteristics and distribution of the resourcefor every area,was divided into 4 sub-area including the temperate climate sub-area,thedrough-spring and cool-summer sub-area,the heat-summer and cold-winter...

By the investigation of germplasm resource of vegetables conducted in Qiannan mountainous area of Guthou province,858 varieties that belong to 41 species of 10 families have been collected and it obviously indicates the abundant vegetable resourccs in thig area.The wholesurveyed area,in view of different climatic characteristics and distribution of the resourcefor every area,was divided into 4 sub-area including the temperate climate sub-area,thedrough-spring and cool-summer sub-area,the heat-summer and cold-winter one,and the warm-spring and heat-summer one in this paper.And a systematic analysis has been done to thosesub-production area.The features and representative varieties haye been advanced for eachsub-area.Some malor cultivated and wild vegetable species were brlefly introduced in thispaper,additionally.

通过对黔南山区蔬菜种质资源考察,共搜集到858份品种,分属10个科41个种,表明该区域有着丰富的蔬菜资源。本文根据各地的气候特点和资源的分布情况,将考察区域分为温和、春旱夏凉、夏热冬冷、春暖夏热4个蔬菜生产小区进行了研究,提出了各小区蔬菜的特点和代表品种,并对主要的栽培和野生蔬菜种类作了简单介绍。

In the presence of some kinds of surfactants, the reaction of Sc(Ⅲ) with 3,5 di Br PADAP is very sensitive. After studying the optimum conditions and some characters of several systems, the system of Sc(Ⅲ) 3,5 di Br PADAP triton X 100 is chosen for the spectrophotometric determination of microamount of scandium. Furthermore, the dual wavelength spectrophotometric analytical method was employed for this system, the microamount of scandium in rare earth matrix can be directly analyzed without separation....

In the presence of some kinds of surfactants, the reaction of Sc(Ⅲ) with 3,5 di Br PADAP is very sensitive. After studying the optimum conditions and some characters of several systems, the system of Sc(Ⅲ) 3,5 di Br PADAP triton X 100 is chosen for the spectrophotometric determination of microamount of scandium. Furthermore, the dual wavelength spectrophotometric analytical method was employed for this system, the microamount of scandium in rare earth matrix can be directly analyzed without separation. The standard added recovery ratios for several real samples of rare earth ores were determined and the results were satisfied.

DeterminationofMicroamountofScandiuminRareEarthWenMeijuanandLengChunhua(温美娟)(冷春华)DepartmentofChemistry,UniversityofScienceand...

 
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